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Old 7th April 2003, 09:43 AM   #71
Join Date: Mar 2003
Location: Lisbon, Portugal
Red face Bypass the op-amps

The picture of the inside of your preamp is not very clear, but it seams to me that the op-amps are not properly bypassed.
The caps are far away from the supply pins.
That has to do with the original circuit, not your fault.
Have you got something hidden under the circuit?
If not, there's no other way with that circuit.
Think of it, you may get better results.
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Old 7th April 2003, 03:22 PM   #72
elizard is offline elizard  Canada
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now i might be wrong here, and not know what i'm talking about ..
but i believe that the red things are caps as well ... ?
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Old 7th April 2003, 04:11 PM   #73
Rarkov is offline Rarkov  England
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You are right about the red components being caps - and non-electrolytic aswell...but they still aren't close enough to be effective decoupling caps.

If you look at the preamp's (our 8021) circuit, you'll see the tiny blue caps are as close as possible to the opamp - and this is one of the very good design features of the 8021 preamp - amongst many others in my opinion.


Just general grammer!
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